Fluid-level indicator.



M M. HART'L W. CARPENTER. FLUID LEVEL INDICATOR. l., l 33,023.

APPLICATION FILED FEB.27, 1914.

2 SHEETS-SHEET 1.

Patented Mar. 23, 1915 I CARPENTER.

FLUID LEVEL INDICATOR.

APPLICATION FILED PBDJ?, 1914.

M. M. HART 6L R. W

United States, -residing MOETIMEB M.

HART AND RALPH. W. CARPENTER, 0F WEISER,

' oiirjicn.

IDAHO.

FLUID-LEVEL INDICATB.

Specification of Letters Patent.

appl-maan mea February er, 1914;. 'semi so.' $21,610.

. Vlowing is a specification.

This invention .relates to improvements in iuidlevel indicators and has particular application to an electrically controlled indicator.

In carrying out the present invention, it is our purpose to provide 'an indicator of the class described whereby t "e rise and fall of the body of fluid willI be automatically indicated so that the condition thereof maybe vascertainedat any time and which will embody among other features a column located within the body of fluid and comprising a plurality of sections insulated one from another and a resistance coil having the turns thereof vconnected with the sections an minishing in number as the distance between the sections and the bottom of the reservoir or container increases so that as the water i level rises and falls the turns of th resistance coil. will be automatically cut out of and into service, a measuring instrument being connected in circuit with the resistance coiland the body of fluid and under `the con-l trol of the latter so lthat as the rises the resistance will be automatically cut out of the circuit and the instrument actuated to denote the height of the water, while when the water level falls the resistanceisY circuit with theinautomatically placed in dicating instrument and the latten actuated to denote the fallof the body of fluid.

It is also our purpose to provide a fluid level indicator which will embrace 'the desired features of simplicity, efiiciency and durability, one whichA may -be installed and maintained at a minimum expense and one whereby an accurate reading may be at all times obtained.

With the above and other obJects in view,

A the invention consists iii the construction,

combination and arrangement of part-s here inafter set forth in and falling within the scope 4vof the claims.

i In the accompanying drawings: Figure 1 is a diagrammatic view of a fluid level'indiin accordance with the Fig. 2 is a vertical secthe column located in cator constructed present invention. tional view through i contain a body of fluid F.

d difluid level' nected in circuit with the body of fluid. Fi 3 is a transverse sectional View through t enlarged fragmentary sectional view through the column showing the manner of connectingthe sections.

eferring now to the accompanying drawings in detail, C designates a suitable form of container or reservoir designed to Located within the-container C is a vertical column or casing 1 comprising a plurality of sections 2 having the meetingends connected. together through the medium of an appropriate form of coupling 3 v'and insulated from. one another asJ at 4. The lower section 2 of the column is connected witha supporting block or foot 4 seated upon thebottom of the container and each section is of any desired length. Detachably connected with the upper openend ofthe column 1 is an inverted cup-shaped cap 5 carrying a resistance coil` 6 having the poles thereof connected with the section 2`and .diminishing in number as the distance between the sections and the bottom of the container increases so that as the iuid within the container rises the resistance sections will be cut out of service,

while when the fluid level falls the resistance sections -will be placed in service. In the 'present instance, the column 2 is reinforced by means ofarms 7, 7 secured to the side wall of the container and the column.

lA measuring instrument 8l in the form of a volt-meter calibrated toread'in feet is conthe resistance coiland the bodyl o fluid. a conductor 9 connecting one terminal of the measuring instrument with the resistance coil, while the remaining terminal of the instrument is connected by Way of a conductor 10 with anarm 11 movable over a resistance grid 12,` the resistance .grid being. connected with the secondary winding of atransformer T, such secondary Winding being grounded as atl.

/ In nracti'ce,the primary winding of the transformer is connected u p with a suitable source of electrical energv and as the level-of the body of Huid F within the container C :rises'the turns of theresistance coil are automatically cut out of the circuit, current flowing from one snide of the secondary winding of the transformer through the resistance grid 12, arm 11. conductor 10, measuring instrument 8. conductor 9, the respective turns of the resistance coil, the section 2 in contact Patented Mar. I'23, 1915.

e same. Fig. 4 is an,

with the upper surface `of the fluid and then lgrounded and located in the conductor 14 is a a switch 15. By means of the switch 15 the the construction,

'resistance coil 6\may be short'circuited and the measuring instrument 8 tested, while any variation in the volta-ge of the current from the source of supply may be compensated for by the arm 1l and resistance 12.

F rom the foregoing description taken in connection with the accompanying drawing, mode of operation and manner of employing our invention will be readily apparent.

`While We have herein shown and described one preferred form of our invention by way of illustration, we wish it to be understood that We do not limit orconfine ourselves to the precise details of construction herein described and delineated, as modification and variation may be made within the scope of the claims without departing from the spirit of the invention. y The column or casing 1 is preferably packed with suitable insulating material in order that the wires therein will be thor-v oughly insulated from one another and sweating eliminated.

We claim.:

1. ln a liuid level indicater, the combina# tionl with a fluid body, of a column therein comprising a plurality of sections insulated l, the height of the Huid.

i instrument connected in circuit with saidreone from another, a resistance coil having the yturns thereof connected= with said sections andA diminishing in number as the height of the sections increase, and a measuring instrument connected in circuit with said resistance coil and the bodvof fluid whereby as the wa ter level rises and falls the measuring instrument will be actuatedv to indicate 2. In a fluid level indicator, the'icombination with afluid body, o f a column therein comprising a plurality f `sectionsinslated one. from another, a resistance coil having the turns thereof connected with said sections and diminishing in number as the height of the sections increase, a measuring sistance coil and the body of fluid whereby as the Water level rises and falls Athe measuring instrument will be actuated vto indicate theheight of the Huid, and means for shorty circuiting said resistance coil and testing said instrument.

tion with a Huid body, of a column therein comprising a plurality of sections insulated one from another, a cap closing the upper end of said column, a resistance coil carried by said cap Within the latter and having the turns thereof connected with said sections and diminishing in number as the height of the sections increase, and a measuring instrument connected in circuit with said re sistance coil and the body of Huid whereby as the Water level rises and falls the instruneit will be actuated to give the level of the 4. ln a uid level indicator, the combinationwith a fluid'bo'dy, comprising a plurality of sections, couplings connecting the meeting ends of the sections, means insulating the sections one from another, a cap carried by the upper end of said column, a resistance coil within said cap and having the turns thereof connected Wit-h said sections and diminishing in number as theA height of the sections increase, and a measuring instrument Aconnectedin circuit with sai resistance coil and the body offluid.

' 5. In a fiuid level indicator, the combination with a fluid body, of a columntherein primary wlnding connected 1n clrcuit wlth il S011 FCR .of supply, and means for lcompensating for any variation in voltage in said secondary winding.

In testimony whereof we affix our signatures in presence of two Witnesses.

" MORTIMER M. HART.

RALPH W. CARPENTER.

l Witnesses:

JAMES W. GAmowaif,

JAMES s.

connected ln circuit with said instrument l of a column therein 

